2104217 has 2 divisors, whose sum is σ = 2104218. Its totient is φ = 2104216.

The previous prime is 2104213. The next prime is 2104229. The reversal of 2104217 is 7124012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1190281 + 913936 = 1091^2 + 956^2 .

It is a cyclic number.

It is not a de Polignac number, because 2104217 - 2² = 2104213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2104195 and 2104204.

It is not a weakly prime, because it can be changed into another prime (2104213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052108 + 1052109.

It is an arithmetic number, because the mean of its divisors is an integer number (1052109).

2^2104217 is an apocalyptic number.

It is an amenable number.

2104217 is a deficient number, since it is larger than the sum of its proper divisors (1).

2104217 is an equidigital number, since it uses as much as digits as its factorization.

2104217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 2104217 is about 1450.5919481370. The cubic root of 2104217 is about 128.1435766838.

Adding to 2104217 its reverse (7124012), we get a palindrome (9228229).

The spelling of 2104217 in words is "two million, one hundred four thousand, two hundred seventeen".